18572312503 has 2 divisors, whose sum is σ = 18572312504. Its totient is φ = 18572312502.

The previous prime is 18572312459. The next prime is 18572312513. The reversal of 18572312503 is 30521327581.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18572312503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18572312513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9286156251 + 9286156252.

It is an arithmetic number, because the mean of its divisors is an integer number (9286156252).

Almost surely, 2^18572312503 is an apocalyptic number.

18572312503 is a deficient number, since it is larger than the sum of its proper divisors (1).

18572312503 is an equidigital number, since it uses as much as digits as its factorization.

18572312503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 18572312503 in words is "eighteen billion, five hundred seventy-two million, three hundred twelve thousand, five hundred three".